# Commodity Price Note vs Piano Sight Training

The clearest difference is in-app purchases: Commodity Price Note at none against Piano Sight Training's 2. Commodity Price Note also leads on iOS requirement (7.0 vs 12.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Piano Sight Training sells 2 in-app purchases, starting at $1.99 per 7 days. Commodity Price Note asks for nothing beyond the download.

Commodity Price Note ships an update every 3 weeks, Piano Sight Training fortnightly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Commodity Price Note | Piano Sight Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 7 MB | 32 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chun-Wei Chen](https://appshunter.io/developer/879061391) | [Dan Arfi](https://appshunter.io/developer/1732517253) |

## What reviewers say

### Commodity Price Note

[App page](https://appshunter.io/ios/app/commodity-price-note-free/id957635832)

**Features:** macOS Compatibility

**In-app purchases:** none


### Piano Sight Training

[App page](https://appshunter.io/ios/app/piano-sight-training/id6566196725)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| weekly subscription | $1.99 | per 7 days |
| yearly subscription | $12.99 | per year |


## Frequently asked questions

### Is Commodity Price Note free?

Commodity Price Note is free to download, with no in-app purchases.

### Is Piano Sight Training free?

Piano Sight Training is free to download, with in-app purchases available.

### Do Commodity Price Note or Piano Sight Training have ads?

Neither Commodity Price Note nor Piano Sight Training shows ads.

### Which is updated more often, Commodity Price Note or Piano Sight Training?

Commodity Price Note ships an update every 3 weeks, and Piano Sight Training fortnightly. Most recently, Commodity Price Note was updated on October 26, 2026 and Piano Sight Training on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*